recessive gene test

(Gene Checker) is a

This is a genetic test kit that you can do at home. You can test for genetic diseases by collecting your own saliva.

It is used to determine whether a child has a genetic mutation that may be inherited. In addition, it may help to elucidate symptoms for which the cause is unknown.

Three points to recommend Gene-Checker

Inspections are completed at home!

You can easily test at home without waiting in line for hours at the hospital. You can purchase the test from HIRO NetShop or Amazon. Results can also be confirmed via email.

Genetic counseling is available!

We will introduce you to a specialist doctor at a cooperating clinic on a "Buyer Only" basis. You can receive genetic counseling from the doctor regarding the test results. Counseling is available even for negative test results.

Free return shipping!

Everything needed for return shipping is included in the inspection kit package. Everything is complete with the purchase of the inspection kit!

What is a recessive genetic disorder?

recessive explanatory diagram

Humans have two chromosomes, one of maternal origin and one of paternal origin. A recessive genetic disorder is a disease that occurs when two chromosomes have abnormalities in the same location.

Why do you need an inspection?

The disease may occur when the fetus inherits two chromosomes in which the father and mother have the same genetic abnormality. If one of the chromosomes derived from the mother or father is more than one, the disease does not occur if the other chromosome is not abnormal.

The individual has the relevant genetic diseaseCarrier (Carrier)They say.

For example, if you have a rare disease that affects only 1 in 40,000 people 1/100th x 1/100th x 1/4th
1 of 40,000
This is calculated to mean that there is an estimated 1 in 100 carriers of the disease. If one disease in 40,000 people is investigated in 100 places, this means that theoretically everyone could be a carrier of one of the diseases.

If our tests find abnormalities in the same genetic location in both parents, one in four fetuses will develop the disease, one in two will become carriers, and one in four will be normal.

What the recessive gene test reveals

More than 230 recessive gene tests are available.

Types of diseases that can be tested

  • blood disease

    blood disease
  • childhood cancer

    childhood cancer
  • heart disease

    heart disease
  • epilepsy

  • deafness

  • metabolic disease

    metabolic disease
  • vision impairment

    vision impairment
  • immunodeficiency

  • Other

frequently occurring disease

asymptomatic hearing loss
alpha thalassemia
polycystic kidney disease
Retinitis Pigmentosa26
Duchenne muscular dystrophy X-linked

See all diseases that can be tested

Testing for recessive genetic disease genes

Methods of Inspection/Limitations of Inspection

231 carrier screening tests developed by the Medicover Genetics Ltd. laboratory.
Genomic deoxyribonucleic acid (gDNA) is extracted using standardized methods and mechanically fragmented prior to DNA library preparation.
DNA enrichment of the genomic region of interest is performed using solution-based hybridization methods and sequenced next-generation sequencing (NGS).
The readout sequence data is referenced to a reference genome and mutations are identified using a proprietary bioinformatics pipeline.
Recessive inheritance can be identified in single nucleotide variants, small insertions and deletions (≤30 bases) and copy number variations (CNV).
Variants are classified according to the American College of Medical Genomics and Genomics 3-5 criteria.
Variant classification and interpretation is performed using the Varsome Clinical platform and is based on information available at the time of inspection.
Only pathogenic and suspected pathogenic mutations are reported. Detected but unidentified variants of unknown significance, benign or possibly benign variants will not be reported.
Only pathogenic and suspected pathogenic mutations will be reported. Mutants of unknown significance that have been detected but not identified, and benign or possibly benign mutants will not be reported.
A: If the autosomal result is
A-1: "No clinically significant variants detected."
While it is not a complete guarantee that the subject is not a carrier of a genetic disease, it does indicate the absence of a genetic mutation and says that the likelihood of being a carrier is low.
A-2: "Clinically significant variants detected."
A genetic change is identified, indicating that the subject is a carrier of the disease.
In such cases, they can be carriers of two or more diseases.
Carriers usually do not have symptoms of the disease.
However, it is possible that both genes of the two chromosomes show abnormalities, in which case the possibility that the subject is currently affected or will be in the future cannot be ruled out.
B: For X-linked hereditary diseases:
B-1: "No clinically significant variants detected."
The absence of a hereditary variant indicates that the subject is not affected if the subject is male, and the possibility of carrier is small if the subject is female, but does not completely rule out the possibility of carrier.
B-2: "Clinically significant variants detected":
Indicates that a genetic alteration has been identified and other In the case of female subjects, it is possible that they are carriers.
If the subject is male, it indicates that he is currently affected or may develop the disease in the future.
However, the disease groups in this panel vary in severity and may not present clinically.
The purpose of the test is to detect all variants associated with the detected gene by targeting all coding exons, MANE and/or standard transcripts, and 10 bp of adjacent intronic sequences.
Mutants outside the target region are not intended to be detected by this assay.
Unless otherwise noted, sequence changes (SNVs and INDELS) in promoters and other non-coding regions are not detected in this assay.
Certain sequence changes (SNVs and INDELS) in non-coding regions of the detected gene that are considered clinically important are included in the analysis.
When two variants are identified in a gene, it is not possible to distinguish whether they are on one chromosome (cis) or another (trans).
Genetic changes such as inversion, rearrangement, ploidy, and epigenetic effects are not covered by this test.
Certain sequence variations (SNVs and INDELS) in target regions, including repetitive sequences, highly homologous sequences such as segmental duplications and pseudogenes, and regions of high/low GC content may not be detected.
Copy Number Variations (CNVs) are calculated using high-quality sequencing reads that are free of duplicates and uniquely aligned.
Using GC content normalization and depth of sequencing range approach, CNVs are detected for a subset of target regions.
CNV anomalies are detected when the detected COVERAGE deviates significantly from the COVERAGE estimated from the reference site.
CNV detection is possible down to a few exon-level resolutions.
If the CNV is positive, the orthogonal method is used to confirm the results.
Genomic regions that contain little or no mapping, repetitive sequences, pseudogenes, or high/low GC content will not detect CNV.

The absence of a reported CNV does not guarantee that the CNV is not present, since the detection of CNVs using NGS is less sensitive/specific than the orthogonal quantification method.
The fact that no disease-causing variants are present in the target gene decreases the likelihood of disease, but does not completely eliminate the possibility of disease-related syndromes.
Alpha-thalassemia, spinal muscular atrophy and fragile X syndrome are performed using the methods described below.

  • Alpha Thalassemia:.
    Deletion/duplication analysis of the alpha-globin (HBA) gene cluster (HBZ, HBM, HBA2, HBA1 and HBQ1) and its HS-40 regulatory region is performed by multiple linkage dependent amplification (MLPA) using MRC holland probemix P140, which covers over 90% of affected cases.
    The assay also checks for the presence of Constant Spring Mutation.
    This analysis does not detect other variants of the alpha globin gene or variants of the beta globin gene that can cause disease.
    Certain breakpoints or large deletions/duplications will not be detected.
    Individuals with both deletions and duplications within the alpha gene cluster may appear to have a normal number of alpha-globin copies.
    False positives and false negatives may result from technical or rare forms of alpha thalassemia or rare biological reasons.
  • Spinal muscular atrophy:.
    To detect copy number changes in exons 7 and 8 of the SMN1 gene, MLPA analysis will be performed using the SALSA MLPA probemix P060.
    The test also detects copy number changes in exons 7 and 8 of the SMN2 gene as an interpretive aid for SMN1 copy number determination.
    This test does not detect SMA cases caused by de novo mutations.
    Chromosome phases of SMN1 and SMN2 copies are not detected. The test does not detect "silent carriers," individuals with one or more SMN1 copies on one chromosome and zero copies on the other chromosome.
    False positive and false negative results may occur due to rare sequence mutations, regulatory region mutations, copy number mutations, intron mutations, rare technical reasons, or other rare biological reasons.
  • Fragile X Syndrome:.
    Isolated DNA is amplified by polymerase chain reaction (PCR) to determine the number of CGG repeats within the FMR1 gene.
    PCR products are generated using fluorescently labeled primers and sized by capillary gel electrophoresis.
    Interpretation is based on the number of iterations in the iterated array below.
    Possible mutation: 55~200
    Complete mutation:>200
    Since Southern blotting is not performed, cases exceeding 200 may not be accurately detected.
    In addition, methylation status has not been analyzed.
    Rare genetic variants, mosaicism, blood transfusions, bone marrow transplants, and other rare molecular events can produce false positive or false negative results.
    The development and performance evaluation of the recessive genetic carrier screening test was performed by Medicover Genetics Ltd. which is qualified to perform high complexity under the Clinical Laboratory Improvement Act of 1998 (CLIA).
    The development and performance evaluation of the recessive genetic carrier screening test was conducted by Medicover Genetics Ltd. which is qualified to perform high complexity under the Clinical Laboratory Improvement Act of 1998 (CLIA).

The development and performance evaluation of the recessive genetic carrier screening test was conducted by Medicover Genetics Ltd. which is qualified to perform high complexity under the Clinical Laboratory Improvement Act of 1998 (CLIA).

  • ・NM_000383.4 (AIRE): exon 1
  • ・NM_000414.4 (HSD17B4): exon 5
  • ・NM_001352514.2 (HLCS): exon 1
  • ・NM_013339.4 (ALG6): exon 13
  • ・NM_014244.5 (ADAMTS2): exon 1
  • ・NM_025114.4 (CEP290): exons 5, 23
  • ・NM_000233.4 (LHCGR): exon 1
  • ・NM_001384140.1 (PCDH15): exons 33, 34, 35
  • ・NM_153818.2/NM_002617.4 (PEX10): exon 1
  • ・NM_032520.5 (GNPTG): exon 1
  • ・NM_000521.4 (HEXB): exon 4
  • ・NM_000232.5 (SGCB): exon 1
  • ・NM_020533.3 (MCOLN1): exon 1
  • ・NM_152419.3 (HGSNAT): exon 1.

Additional Information and Disclosures

Validation testing is performed by Medicaver Genetics Ltd.
The test does not identify all mutations associated with the disease tested.
Although the test is extremely accurate, the possibility of false positive or false negative results still exists and can be caused by technical or biological limitations.
They include rare genetic variants, mosaicism, blood transfusions, bone marrow transplants, or other rare molecular events.
Some genetic alterations that are not detected may be affected and are not tested by the carrier screening test.
Although genetic testing is an important part of the diagnostic process, genetic testing does not always provide definitive answers. In some cases, a genetic mutation may be present, but the test may not identify it.
This is due to limitations in current medical knowledge or testing techniques.
Concurrent use of other clinical data and clinical findings is recommended.
The outcome results should always be considered in the context of other clinical findings.
The clinician who referred the patient for testing is responsible for pre- and post-test counseling, including advice regarding the need for additional genetic testing.
Other diagnostic tests may be required.

National Collaborating Medical Centers for Recessive Genetics

This will be the medical institution to which you are referred if the test results show high risk.

Find a medical facility near you

Hokkaido region

Hokkaido (northernmost of the four main islands of Japan)

Tohoku region (northernmost six prefectures of Honshu)

Miyagi prefecture (Tohoku area)

Kanto region (inc. Tokyo, Kanagawa, Saitama, Gunma, Tochigi and Chiba prefectures)

Saitama prefecture (Kantou area)

Tokyo Metropolitan area

Chuo Ward (esp. Tokyo)

Kanagawa prefecture (Kantou area)

Chubu region (inc. Aichi, Nagano, Shizuoka, Niigata, Toyama, Ishikawa and Fukui prefectures)

Aichi prefecture (Chuubu area)

HIRO CLINIC Nagoya Ekimae Clinic

Chugoku region

Okayama prefecture (Chuugoku area)

Shikoku region (inc. Tokushima, Kagawa, Ehime and Kochi prefectures)

Kyushu region (incl. Southwestern Islands)

Fukuoka prefecture (Kyushu)


for one person's use

This is a one-person test kit. It can also be used to test babies.

Recommended for

  • Persons who may have congenital diseases
  • People with unexplained diseases
  • People who want to know if they are likely to develop the same disease as you.
  • People who want to check if their unborn baby will develop the disease in the future.

200,000 yen

(220,000 yen including tax)

for two people

This is a two-person inspection kit.

Recommended for

  • Couples who want to find out if they have the same recessive gene before marriage.
  • Couples who want to know about the risk of developing a child during pregnancy.

400,000 yen

(440,000 yen including tax)

For inquiries, please contact

If you have any questions about Gene-Checker, please feel free to contact us by phone or e-mail.